Murray, 31, will appear in multiple episodes of the gritty TNT cop drama as Dave Mendoza, a likeable cop who is also a bit of a loose cannon. His off-duty antics aren't exactly a good influence on Officer Sherman (McKenzie). Funny, we always thought Murray's Lucas Scott was the lesser of two bad boys compared to McKenzie's Ryan Atwood. Tree Hill doesn't hold a candle to the rough streets of Chino, no?